CATBearing & Bushing

9W9400 Cylinder Gp-Boom — Cat 225D 229

This is a Caterpillar boom cylinder assembly, crucial for the hydraulic system that controls the movement and positioning of the boom on heavy equipment. It is manufactured to meet stringent OEM standards, ensuring superior durability and performance compared to worn or damaged components. Operators may notice slow or erratic boom movement, or a complete loss of hydraulic pressure in the boom circuit when this part fails.

Cylinder Gp-Boom – Part No 9W9400 – CAT Spare Part
Part Specifications
BrandCAT
CategoryBearing & Bushing
ConditionAftermarket — OEM Specification
DispatchSame-day from Mumbai (before 3 PM IST)
GST InvoiceAvailable — all orders
Export DocsCommercial invoice, packing list, COO

Compatible Models

Always verify with serial number before ordering.

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Installation & Application Notes

Never strike bearings directly — use a bearing press or driver set. Heat housing (not bearing) to ease installation. Replace bearings in sets where applicable. Check housing bore diameter before fitting — out-of-round bores destroy new bearings.

Always consult the OEM service manual for model-specific torque values and procedures. WhatsApp our technical team if you need fitment guidance.

Part TypeCylinder Assembly
MaterialSteel alloy
ApplicationBoom hydraulic circuit
Service LifeReplace as needed based on inspection
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

Initial signs of a failing boom cylinder include a noticeable decrease in lifting capacity or slower boom operation. If left unaddressed, the cylinder may begin to leak internally or externally, leading to gradual loss of hydraulic pressure and control. Continued operation with a compromised cylinder risks uncontrolled boom movement, potentially damaging the equipment or surrounding structures.

Installation Tip

Before installing, carefully inspect the cylinder rod for any scoring or damage that could compromise the new seals. Avoid overtightening hydraulic fittings, as this can damage the threads or the fitting itself.

Service Note

Inspect hydraulic hoses and seals for the boom circuit for signs of wear or leakage when replacing the cylinder assembly.